如何在c#中匹配URL？
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How to match URL in c#?
提问by Tomasz Smykowski
I have found many examples of how to match particular types of URL-s in PHP and other languages. I need to match any URL from my C# application. How to do this? When I talk about URL I talk about links to any sites or to files on sites and subdirectiories and so on.
我找到了许多关于如何在 PHP 和其他语言中匹配特定类型的 URL 的示例。我需要匹配来自我的 C# 应用程序的任何 URL。这该怎么做？当我谈论 URL 时，我谈论的是指向任何站点的链接或指向站点和子目录等文件的链接。
I have a text like this: "Go to my awsome website http:\www.google.pl\something\blah\?lang=5" or else and I need to get this link from this message. Links can start only with www. too.
我有这样的文字：“转到我的 awsome 网站 http:\www.google.pl\something\blah\?lang=5” 或者我需要从此消息中获取此链接。链接只能以 www 开头。也。
采纳答案by michele
If you need to test your regex to find URLs you can try this resource
如果您需要测试您的正则表达式以查找 URL，您可以尝试此资源
It will test your regex while you're writing it.
它会在您编写正则表达式时测试您的正则表达式。
In C# you can use regex for example as below:
在 C# 中，您可以使用正则表达式，例如：
Regex r = new Regex(@"(?<Protocol>\w+):\/\/(?<Domain>[\w@][\w.:@]+)\/?[\w\.?=%&=\-@/$,]*");
// Match the regular expression pattern against a text string.
Match m = r.Match(text);
while (m.Success)
{
//do things with your matching text
m = m.NextMatch();
}
回答by DanDan
回答by almog.ori
Regex regx = new Regex("http(s)?://([\w+?\.\w+])+([a-zA-Z0-9\~\!\@\#\$\%\^\&\*\(\)_\-\=\+\\\/\?\.\:\;\'\,]*)?", RegexOptions.IgnoreCase);
回答by David
Here's one defined for URL's.
这是为 URL 定义的一个。
^http(s?)\:\/\/[0-9a-zA-Z]([-.\w]*[0-9a-zA-Z])*(:(0-9)*)*(\/?)([a-zA-Z0-9\-\.\?\,\'\/\\+&%$#_]*)?$
回答by apiguy
This will return a match collection of all matches found within "yourStringThatHasUrlsInIt":
这将返回在“yourStringThatHasUrlsInIt”中找到的所有匹配项的匹配集合：
var pattern = @"((ht|f)tp(s?)\:\/\/|~/|/)?([w]{2}([\w\-]+\.)+([\w]{2,5}))(:[\d]{1,5})?";
var regex = new Regex(pattern);
var matches = regex.Matches(yourStringThatHasUrlsInIt);
The return will be a "MatchCollection" which you can read more about here:
返回将是“MatchCollection”，您可以在此处阅读更多信息：
http://msdn.microsoft.com/en-us/library/system.text.regularexpressions.matchcollection.aspx
http://msdn.microsoft.com/en-us/library/system.text.regularexpressions.matchcollection.aspx
回答by Chuck Rostance
Microsoft has a nice page of some regular expressions...this is what they say (works pretty good too)
微软有一个不错的正则表达式页面……这就是他们所说的（效果也很好）
^(ht|f)tp(s?)\:\/\/[0-9a-zA-Z]([-.\w]*[0-9a-zA-Z])*(:(0-9)*)*(\/?)([a-zA-Z0-9\-\.\?\,\'\/\\+&%$#_]*)?$
http://msdn.microsoft.com/en-us/library/ff650303.aspx#paght000001_commonregularexpressions
http://msdn.microsoft.com/en-us/library/ff650303.aspx#paght000001_commonregularexpressions
回答by AnonymousUser
//This code return (protocol://)host:port from URL
//Commented URL's with different protocols. Just uncomment to test.
//string url = "http://www.contoso.com:8080/letters/readme.html";
//string url = "ftp://www.contoso.com:8080/letters/readme.html";
//string url = "l2tp://1.5.8.6:8080/letters/readme.html";
string url = "l2tp://1.5.8.6:8080/letters/readme.html";
string host = "";//empty string with host from url
//protocol, (ip/domain), port
host = Regex.Match(url, @"^(?<proto>\w+)://+?(?<host>[A-Za-z0-9\-\.]+)+?(?<port>:\d+)?/", RegexOptions.None, TimeSpan.FromMilliseconds(150)).Result("${proto}://${host}${port}");
//(ip/domain):port without protocol. If HTTPS board loading images from HTTP host.
//host = Regex.Match(url, @"^(?<proto>\w+)://+?(?<host>[A-Za-z0-9\-\.]+)+?(?<port>:\d+)?/", RegexOptions.None, TimeSpan.FromMilliseconds(150)).Result("${host}${port}");
Console.WriteLine("url: "+url+"\nhost: "+host); //display host
